Gas-Fired Water Boilers Provide Years of Efficient Heat.

Gas-fired water boilers offer comfortable, even heat almost silently. What’s even better is their high-level energy efficiency. At TemperaturePro® in Englewood, most all of the Lennox® gas-fired water boilers we offer are ENERGY STAR® qualified.

Learn about the benefits of our high-efficiency boilers.

GWM-IE Boiler

This ENERGY STAR® qualified, gas-modulating condensing water boiler is 40% more efficient than conventional boilers. In fact, it boasts a 95% AFUE rating.* To maximize fuel savings, it features an electronic ignition control that turns on the burner to match your household demand to make sure it uses only the energy it needs to keep you warm.

  • Strong, self-cleaning, stainless steel heat exchanger converts waste energy into usable heat
  • Sealed combustion reduces noise
  • Modulating capability perfectly meets your comfort needs by allowing the burner to fire at as low as 20% of its capacity
  • Stainless steel mesh burner combats corrosion and oxidation
  • CPVC flue condensate collector is corrosion-resistant and eliminates the use of metal in the venting area.
  • 15-year limited warranty on heat exchanger, 10-year limited warranty on remaining covered components
GWM-IE Boiler
Efficiency Rating (AFUE): up to 95
Energy Star badge

GWB9-IH Boiler

The GWB9-IH boiler effortlessly integrates with a traditional radiator system and is ENERGY STAR qualified with an AFUE rating of 90%.* Its cast-aluminum heat exchanger carries heat quickly—up to three times faster than a typical cast-iron exchanger.

  • Durable, heavy-gauge steel cabinet with baked-on paint finish
  • Compact design for installation flexibility
  • Sealed combustion keeps noise at a minimum
  • Electronic ignition monitors water temperature and turns on the burner only when it is needed
  • Burns natural gas or can be converted to LP gas
  • 15-year limited warranty on heat exchanger, 10-year limited warranty on remaining covered components
GWB9-IH Boiler
Efficiency Rating (AFUE): up to 90
Energy Star badge

GWB8-IE Boiler

Far more efficient than an older boiler, the GWB8 boiler boasts an 84.4% efficiency rating*—plus, it works with conventional radiator systems.

  • Electronic ignition oversees water temperature and lights the burner only when needed
  • Thick fiberglass insulation minimizes off-cycle heat and energy loss
  • Cast-iron heat exchanger and titanium burners engineered for years of reliable use
  • Comes in six different sizes for ultimate installation flexibility
  • Burns natural gas or can convert to LP gas
  • 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts
GWB8-IE Boiler
Efficiency Rating (AFUE): up to 84.4

GWB8-E Boiler

This standard-efficiency boiler can perform for years to come with its long-lasting cast-iron heat exchanger and durable stainless steel burners.

  • Electronic ignition oversees water temperature and lights the burner only when needed
  • Thick fiberglass insulation significantly reduces off-cycle heat and energy loss
  • Compatible with traditional radiator systems
  • Comes in nine different sizes for installation anywhere in your home
  • Burns natural gas or can be converted to LP gas
  • 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts
GWB8-E Boiler
Efficiency Rating (AFUE): up to 83.9

Give us a call at 720-446-5100 or schedule an appointment online so our experts at TemperaturePro® in Englewood can help you find the right boiler for you, or fix your boiler so it is running as smoothly and efficiently as possible.